Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2021-34947

NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 82 products from netgear, from netgear, from netgear and 79 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2024, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2024-05-07T23:15:07.653

Last Modified

2025-08-14T01:42:44.800

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.0: 8.8 (HIGH)

Weaknesses
  • Type: Secondary
    CWE-787
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System netgear d7800_firmware < 1.0.1.64 Yes
Hardware netgear d7800 - No
Operating System netgear ex2700_firmware < 1.0.1.66 Yes
Hardware netgear ex2700 - No
Operating System netgear ex6100_firmware < 1.0.1.106 Yes
Hardware netgear ex6100 v2 No
Operating System netgear ex6150_firmware < 1.0.1.106 Yes
Hardware netgear ex6150 v2 No
Operating System netgear ex6200_firmware < 1.0.1.86 Yes
Hardware netgear ex6200 v2 No
Operating System netgear ex6250_firmware < 1.0.0.146 Yes
Hardware netgear ex6250 - No
Operating System netgear ex6400_firmware < 1.0.2.164 Yes
Hardware netgear ex6400 - No
Operating System netgear ex6400v2_firmware < 1.0.0.146 Yes
Hardware netgear ex6400v2 - No
Operating System netgear ex6410_firmware < 1.0.0.146 Yes
Hardware netgear ex6410 - No
Operating System netgear ex6420_firmware < 1.0.0.146 Yes
Hardware netgear ex6420 - No
Operating System netgear ex6500v1_firmware < 1.0.0.146 Yes
Hardware netgear ex6500v1 - No
Operating System netgear ex7300_firmware < 1.0.2.164 Yes
Hardware netgear ex7300 - No
Operating System netgear ex7300v2_firmware < 1.0.0.146 Yes
Hardware netgear ex7300v2 - No
Operating System netgear ex7320_firmware < 1.0.0.146 Yes
Hardware netgear ex7320 - No
Operating System netgear ex7700_firmware < 1.0.0.222 Yes
Hardware netgear ex7700 - No
Operating System netgear ex8000_firmware < 1.0.1.238 Yes
Hardware netgear ex8000 - No
Operating System netgear lbr1020_firmware < 2.6.5.32 Yes
Hardware netgear lbr1020 - No
Operating System netgear lbr20_firmware < 2.6.5.32 Yes
Hardware netgear lbr20 - No
Operating System netgear r6700ax_firmware < 1.0.5.108 Yes
Hardware netgear r6700ax - No
Operating System netgear r7800_firmware < 1.0.2.84 Yes
Hardware netgear r7800 - No
Operating System netgear r8900_firmware < 1.0.5.36 Yes
Hardware netgear r8900 - No
Operating System netgear r9000_firmware < 1.0.5.36 Yes
Hardware netgear r9000 - No
Operating System netgear rax10_firmware < 1.0.5.108 Yes
Hardware netgear rax10 - No
Operating System netgear rax120_firmware < 1.2.2.24 Yes
Hardware netgear rax120 - No
Operating System netgear rax120v2_firmware < 1.2.2.24 Yes
Hardware netgear rax120v2 - No
Operating System netgear rax70_firmware < 1.0.5.108 Yes
Hardware netgear rax70 - No
Operating System netgear rax78_firmware < 1.0.5.108 Yes
Hardware netgear rax78 - No
Operating System netgear rbr10_firmware < 2.7.4.24 Yes
Hardware netgear rbr10 - No
Operating System netgear rbr20_firmware < 2.7.4.24 Yes
Hardware netgear rbr20 - No
Operating System netgear rbr40_firmware < 2.7.4.24 Yes
Hardware netgear rbr40 - No
Operating System netgear rbr50_firmware < 2.7.4.24 Yes
Hardware netgear rbr50 - No
Operating System netgear rbs10_firmware < 2.7.4.24 Yes
Hardware netgear rbs10 - No
Operating System netgear rbs20_firmware < 2.7.4.24 Yes
Hardware netgear rbs20 - No
Operating System netgear rbs40_firmware < 2.7.4.24 Yes
Hardware netgear rbs40 - No
Operating System netgear rbs50_firmware < 2.7.4.24 Yes
Hardware netgear rbs50 - No
Operating System netgear rbs50y_firmware < 2.7.4.12 Yes
Hardware netgear rbs50y - No
Operating System netgear wn3000rpv2_firmware < 1.0.0.88 Yes
Hardware netgear wn3000rpv2 - No
Operating System netgear wnr2000v5_firmware < 1.0.0.78 Yes
Hardware netgear wnr2000v5 - No
Operating System netgear xr450_firmware < 2.3.2.130 Yes
Hardware netgear xr450 - No
Operating System netgear xr500_firmware < 2.3.2.130 Yes
Hardware netgear xr500 - No
Operating System netgear xr700_firmware < 1.0.1.44 Yes
Hardware netgear xr700 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For netgear's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.